Rear shell of gearbox

Abstract

The utility model relates to the technical field of gearbox design, and discloses a gearbox rear shell which comprises a rear shell body and a shaft tube part, two vertical plates are arranged on the lower side of the shaft tube part, and a seat plate used for abutting against an automobile chassis is arranged on the lower side between the two vertical plates. A thickening plate with the extending direction parallel to the extending direction of the seat plate is arranged in the middle of the seat plate, through holes are formed in the two ends of the thickening plate, hexagon socket screws penetrating through the through holes and an automobile chassis are arranged on the through holes, connecting nuts used for abutting against the automobile chassis are connected to the hexagon socket screws in a threaded mode, and the hexagon socket screws are sleeved with locking washers. A limiting piece used for limiting rotation of the inner hexagon bolt is arranged on the base plate. When the rear shell body is installed on the automobile chassis, the inner hexagon bolts penetrate through the through holes in the thickening plates and then penetrate through the automobile chassis, then the connecting nuts and the locking washers are used for locking, at the moment, the rear shell body can be installed on the automobile chassis through the vertical plates and the seat plates, and at the moment, stable installation of the rear shell body can be facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearbox design, and particularly relates to a gearbox rear housing. Background Art

[0002] The transmission, also known as the gearbox, is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or divided manner. The transmission consists of a speed transmission mechanism and an operating mechanism. Some cars also have a power output mechanism. Most transmission mechanisms use ordinary gear transmissions, and some use planetary gear transmissions. Ordinary gear transmission speed change mechanisms generally use sliding gears and synchronizers.

[0003] At present, a Chinese patent with publication number CN220118611U and publication date December 1, 2023 discloses a gearbox bearing lubrication structure, including a clutch housing and a rear housing connected to the clutch housing, a gearbox cavity for storing lubricating oil is provided between the clutch housing and the rear housing, and a gearbox gear set is provided in the gearbox cavity, an input shaft bearing is provided on the circumferential inner side of the clutch housing and an output shaft bearing is provided on the circumferential inner side of the rear housing, the clutch housing is provided with an input shaft bearing lubrication assembly which is integrally formed on the inner side of the clutch housing and can drain the lubricating oil in the gearbox cavity to the outside of the input shaft bearing, and the rear housing is provided with an output shaft bearing lubrication assembly which is integrally formed on the inner side of the rear housing and can drain the lubricating oil in the gearbox cavity to the outside of the output shaft bearing.

[0004] The clutch housing and the rear housing are fixedly connected by bolts.

[0005] The Chinese patent with publication number CN218935219U and publication date April 28, 2023 discloses a four-wheel drive two-speed gearbox, including a front housing and a rear housing that are fixedly connected, and an installation cavity is formed inside the front and rear housings, and a parallel input shaft, an intermediate shaft, a differential and a vertical output shaft are rotatably connected inside the installation cavity, two sets of meshing matching gears are arranged on the input shaft and the intermediate shaft, a synchronizer is also arranged on the input shaft, and a driving transmission gear is also arranged on the intermediate shaft. The two half shafts of the differential extend to the outside of the installation cavity, and a driven transmission gear and a driving bevel gear are arranged on the differential housing, and the driven transmission gear is meshed with the driving transmission gear. A driven bevel gear is fixedly arranged on the inner end of the input shaft, and a synchronous clutch is arranged on the end of the output shaft extending to the outside of the installation cavity, and the driving bevel gear is meshed with the driven bevel gear.

[0006] The output shaft passes through the rear housing, which is fixed to the front housing by bolts. Meanwhile, the front housing is fixed to the chassis of the vehicle by bolts. However, the rear housing is only fixed to the front housing by bolts. Therefore, the installation of the rear housing is not stable, which is not conducive to the stable installation of the output shaft in the rear housing. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a rear housing of a gearbox, which is beneficial to the stable installation of the rear housing body.

[0008] The above technical purpose of the present utility model is achieved through the following technical solutions: A rear housing of a gearbox includes a rear housing body and a shaft tube portion located on one side of the rear housing body and through which an output shaft passes. Two vertical plates are provided on the lower side of the shaft tube portion. A seat plate for abutting against the vehicle chassis is provided on the lower side between the two vertical plates. A thickening plate with an extending direction parallel to the extending direction of the seat plate is provided in the middle of the seat plate. Through holes are provided at both ends of the thickening plate. Hexagon socket head cap screws passing through the through holes and the vehicle chassis are provided on the through holes. Connecting nuts for tightly pressing against the vehicle chassis are threadedly connected to the hexagon socket head cap screws. Lock washers are sleeved on the hexagon socket head cap screws. A limiting member for limiting the rotation of the hexagon socket head cap screws is provided on the seat plate.

[0009] The further setting of the present utility model is: The hexagon socket head cap screw includes a bolt head with an internal hexagon groove provided on the upper surface and a threaded rod provided on the lower side of the bolt head. The limiting member includes sliding grooves provided on both sides of the thickening plate, a sliding seat provided on the upper side of the thickening plate and having a "冂"-shaped cross section, sliders provided at both ends of the sliding seat and respectively embedded in the sliding grooves on both sides, an internal hexagon sleeve provided in the middle of the sliding seat and extending in the vertical direction, and a regular hexagonal prism embedded in the internal hexagon sleeve and having a lower end for being embedded in the internal hexagon groove.

[0010] The further setting of the present utility model is: A connecting plate is provided at the upper end of the regular hexagonal prism. Guide posts extending in the vertically downward direction are provided at both ends of the connecting plate. Guide holes for the guide posts to pass through are provided on the sliding seat. A connecting disk is provided at the lower end of the guide post. A return spring with a lower end abutting against the connecting disk and an upper end abutting against the inner wall of the sliding seat is sleeved on the guide post.

[0011] The further setting of the present utility model is: A middle plate portion connected to the lower side of the shaft tube portion is provided at the position between the middle of the seat plate and the two vertical plates.

[0012] The further setting of the present utility model is: Cross plates connected to the vertical plates are provided on both sides of the middle plate portion.

[0013] The further setting of the present utility model is: A first reinforcing rib connected to the shaft tube portion is provided at the middle position of the vertical plate.

[0014] The further setting of the present utility model is: Second reinforcing ribs are provided on both sides of the shaft tube portion.

[0015] In summary, the present utility model has the following beneficial effects:

[0016] 1. When the rear housing body is fixed to the front housing body by bolts, the rear housing body is connected to the seat plate by two vertical plates, and the seat plate is in contact with the chassis of the car. Then, the hexagon socket bolts are passed through the through holes on the thickened plate and then through the chassis of the car, and then the connecting nuts and locking washers are used for locking. At this time, the rear housing body can be installed and supported on the chassis of the car by the vertical plates and the seat plate, which is conducive to the stable installation of the rear housing body;

[0017] When the connecting nut is screwed, the rotation of the hexagon socket bolt is limited by the limiting member, which is conducive to the rapid threaded connection of the connecting nut on the hexagon socket bolt; at the same time, after the threaded connection is completed, the rotation limit of the hexagon socket bolt by the limiting member can prevent loosening, which is conducive to the stable connection of the hexagon socket bolt;

[0018] 2. Pass the threaded rod of the hexagon socket bolt through the through hole on the thickened plate, then slide the sliding seat along the slide groove toward the side close to the through hole, so that the hexagon socket is aligned with the position of the bolt head, and then rotate the bolt head so that the hexagon socket of the bolt head coincides with the hexagon socket, and then pass the regular hexagonal prism through the hexagon socket and embed the lower end into the hexagon socket. At this time, the rotation of the bolt head can be limited by the regular hexagonal prism, and finally the rotation of the hexagon socket bolt can be limited;

[0019] 3. Pull up the connecting plate so that the lower end of the regular hexagonal prism is located in the inner hexagonal sleeve and the reset spring is compressed. At this time, the sliding seat can be easily moved to the position of the through hole. Then loosen the connecting plate. Under the elastic restoring force of the reset spring, the regular hexagonal prism moves downward and can be embedded in the inner hexagonal groove.

[0020] 4. By using the middle plate part connected to the lower side of the shaft tube part at the position between the middle part of the seat plate and the two vertical plates, the middle plate part can increase the structural strength between the seat plate and the two vertical plates, thereby facilitating the stable support of the seat plate and the two vertical plates to the shaft tube part;

[0021] 5. By using the horizontal plates connected to the vertical plates arranged on both sides of the middle plate, the horizontal plates can increase the structural strength of the two vertical plates, which is conducive to the stable support of the two vertical plates to the shaft tube;

[0022] 6. The vertical plate is connected to the shaft tube portion by the first reinforcing rib, which can further facilitate the stable support of the shaft tube portion by the two vertical plates;

[0023] 7. The shaft tube part utilizes second reinforcing ribs arranged on both sides. The second reinforcing ribs can increase the structural strength of the shaft tube part, which is beneficial to the stable connection of the shaft tube part to the rear shell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0027] Figure 3 It is a partial cross-sectional view of the connection relationship between the vertical plate, the seat plate, the hexagon socket bolts and the limiting parts in the utility model.

[0028] In the figure, 1, rear shell body; 2, shaft tube part; 21, second reinforcing rib; 3, vertical plate; 31, first reinforcing rib; 4, seat plate; 41, thickened plate; 411, through hole; 5, hexagon socket bolt; 51, bolt head; 52, threaded rod; 6, connecting nut; 7, locking washer; 8, limiter; 81, slide groove; 82, sliding seat; 821, guide hole; 83, slider; 84, hexagon socket; 85, regular hexagonal prism; 851, connecting plate; 852, guide column; 853, connecting disk; 854, reset spring; 9, middle plate; 91, horizontal plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] A gearbox rear housing, referring to Figure 1 The rear housing of the gearbox includes a rear housing body 1 and a shaft tube 2, wherein the rear housing body 1 is used to be connected to the front housing of the gearbox by bolts, and the shaft tube 2 is integrally arranged on one side of the rear housing body 1 and for the output shaft to pass through; at the same time, second reinforcing ribs 21 are integrally arranged on both sides of the shaft tube 2; wherein two parallel vertical plates 3 are integrally arranged on the lower side of the shaft tube 2, and a seat plate 4 for contacting with the chassis of the automobile is integrally arranged on the lower side between the two vertical plates 3, and a middle plate 9 connected to the lower side of the shaft tube 2 is integrally arranged at the middle part of the seat plate 4 and between the two vertical plates 3, and horizontal plates 91 connected to the vertical plates 3 are integrally arranged on both sides of the middle plate 9, wherein a first reinforcing rib 31 connected to the shaft tube 2 is integrally arranged at the middle position of the vertical plate 3.

[0031] Refer to Figure 1 、 Figure 2 、 Figure 3 In the middle of the seat plate 4, a thickening plate 41 is integrally provided, and the extending direction of the thickening plate 41 is parallel to the extending direction of the seat plate 4. Through holes 411 are provided at both ends of the thickening plate 41. An internal hexagonal bolt 5 that passes through the through hole 411 and passes through the vehicle chassis is provided on the through hole 411. The internal hexagonal bolt 5 includes a bolt head 51 with an internal hexagonal groove on the upper surface and a threaded rod 52 integrally provided on the lower side of the bolt head 51. A connecting nut 6 for pressing against the vehicle chassis is threadedly connected to the internal hexagonal bolt 5. At the same time, a locking washer 7 is sleeved on the internal hexagonal bolt 5.

[0032] Refer to Figure 2 、 Figure 3 A limiting member 8 for limiting the rotation of the internal hexagonal bolt 5 is further provided on the seat plate 4. The limiting member 8 includes a sliding groove 81, a sliding seat 82, a sliding block 83, an internal hexagonal sleeve 84, and a regular hexagonal prism 85. The sliding groove 81 is provided on both sides of the thickening plate 41, and the sliding seat 82 wraps around the upper side of the thickening plate 41. At the same time, the cross section of the sliding seat 82 is in a "冂" shape. The sliding blocks 83 are integrally provided at both ends of the sliding seat 82 and are respectively embedded in the sliding grooves 81 on both sides. The internal hexagonal sleeve 84 is integrally provided in the middle of the sliding seat 82 and extends in the vertical direction. The regular hexagonal prism 85 is embedded in the internal hexagonal sleeve 84, and the lower end is used to be embedded in the internal hexagonal groove of the bolt head 51. At the same time, a connecting plate 851 is welded to the upper end of the regular hexagonal prism 85, and guide posts 852 extending in the vertically downward direction are welded to both ends of the connecting plate 851. A guide hole 821 for the guide post 852 to pass through is provided on the sliding seat 82. A connecting disk 853 is integrally provided at the lower end of the guide post 852, and the outer diameter of the connecting disk 853 is larger than the cross-sectional outer diameter of the guide post 852. At the same time, a return spring 854 is sleeved on the guide post 852, and the lower end of the return spring 854 abuts against the connecting disk 853 and the upper end abuts against the inner wall of the sliding seat 82.

[0033] Principle: When the rear housing body 1 is fixed to the front housing by bolts, the rear housing body 1 then uses two vertical plates 3 to connect the seat plate 4, and the seat plate 4 abuts against the vehicle chassis. Subsequently, the internal hexagonal bolt 5 passes through the through hole 411 on the thickening plate 41 and then passes through the vehicle chassis, and then is locked by the connecting nut 6 and the locking washer 7. At this time, the rear housing body 1 can be installed and supported on the vehicle chassis through the vertical plate 3 and the seat plate 4, which is beneficial to the stable installation of the rear housing body 1;

[0034] When the connecting nut 6 is screwed, the connecting plate 851 is first pulled up so that the lower end of the regular hexagonal prism 85 is located in the inner hexagonal sleeve 84 and the return spring 854 is compressed. Then the sliding seat 82 slides along the slide groove 81 toward the side close to the through hole 411, so that the inner hexagonal sleeve 84 is aligned with the position of the bolt head 51. When the bolt head 51 is rotated, the inner hexagonal groove of the bolt head 51 coincides with the inner hexagonal sleeve 84. Then the connecting plate 851 is loosened. Under the elastic restoring force of the return spring 854, the regular hexagonal prism 85 can be embedded in the inner hexagonal groove after moving downward. At this time, the rotation of the bolt head 51 can be limited by the regular hexagonal prism 85, and finally the rotation limitation of the inner hexagonal bolt 5 can be completed, which is conducive to the rapid threaded connection of the connecting nut 6 on the inner hexagonal bolt 5; at the same time, after the threaded connection is completed, the rotation limitation of the regular hexagonal prism 85 on the inner hexagonal bolt 5 can play an anti-loosening effect, which is conducive to the stable connection of the inner hexagonal bolt 5.

Claims

1. A rear housing of a transmission, comprising a rear housing body (1) and a shaft tube portion (2) located on one side of the rear housing body (1) and through which an output shaft passes. It is characterized in that: On the lower side of the shaft tube portion (2), there are two vertical plates (3). On the lower side between the two vertical plates (3), there is a seat plate (4) for abutting against the vehicle chassis. In the middle of the seat plate (4), there is a thickening plate (41) whose extending direction is parallel to the extending direction of the seat plate (4). Through holes (411) are formed at both ends of the thickening plate (41). An internal hexagonal bolt (5) that passes through the through hole (411) and the vehicle chassis is provided on the through hole (411). A connection nut (6) for tightly pressing against the vehicle chassis is threadedly connected to the internal hexagonal bolt (5). A lock washer (7) is sleeved on the internal hexagonal bolt (5). A limiting member (8) for limiting the rotation of the internal hexagonal bolt (5) is provided on the seat plate (4).

2. A rear housing of a transmission according to claim 1, It is characterized in that: The internal hexagonal bolt (5) includes a bolt head (51) with an internal hexagonal groove on its upper surface and a threaded rod (52) provided on the lower side of the bolt head (51). The limiting member (8) includes sliding grooves (81) formed on both sides of the thickening plate (41), a sliding seat (82) provided on the upper side of the thickening plate (41) and having a "冂”-shaped cross section, sliders (83) provided at both ends of the sliding seat (82) and respectively embedded in the sliding grooves (81) on both sides, an internal hexagonal sleeve (84) provided in the middle of the sliding seat (82) and extending in the vertical direction, and a regular hexagonal prism (85) embedded in the internal hexagonal sleeve (84) and having a lower end for embedding in the internal hexagonal groove.

3. A rear housing of a transmission according to claim 2, It is characterized in that: At the upper end of the regular hexagonal prism (85), there is a connecting plate (851). At both ends of the connecting plate (851), there are guide posts (852) extending in the vertically downward direction. A guide hole (821) for the guide posts (852) to pass through is formed on the sliding seat (82). At the lower end of the guide post (852), there is a connecting disk (853). A return spring (854) whose lower end abuts against the connecting disk (853) and whose upper end abuts against the inner wall of the sliding seat (82) is sleeved on the guide post (852).

4. A rear housing of a transmission according to claim 1, It is characterized in that: At the position between the middle of the seat plate (4) and the two vertical plates (3), there is a middle plate portion (9) connected to the lower side of the shaft tube portion (2).

5. A rear housing of a transmission according to claim 4, It is characterized in that: On both sides of the middle plate portion (9), there are transverse plates (91) connected to the vertical plates (3).

6. A rear housing of a transmission according to claim 1, It is characterized in that: At the middle position of the vertical plate (3), there is a first reinforcing rib (31) connected to the shaft tube portion (2).

7. A rear housing of a transmission according to claim 1, It is characterized in that: On both sides of the shaft tube portion (2), there are second reinforcing ribs (21).

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